Spinning-machine guide



Jan. 4 1927.

H. SCHNElDER SPINNING MACHINE GUIDE Filed July 30. 1924 roving is to be attained, it is even necessary Patented den. 4, 1927.

HEINRICH sonnet-Lona, or Lnivzsnne, swt'rznn'nann.

srrivnrno-nmonrnn Quinn.

Application filed July 30,1924, Serial No. 729,129, and in GermanyFebriiary 5; 1924.

This invention relates to improvements in and appertaining to spinning,'twisting and like machines for the production of yarns, rove and threads and more particularly to the type known as fiyers or roving frames and having two staggered series of bobbins or spindles for the production or roving.

For the production of rove flyer frames have hitherto been used, the bobbins of which possess a special drive. Self-braking bobbins ot the usual construction cannot be employed here, as the rove with its soft twist is not able to transmit thepull necessary to overcome the normal bobbin t'riction; The speed of the tlyer and ot the bobbin must furthermore have a certain ratio tor each layer of yarn upon the bobbin and to etlect this the i'lyer and bobbin drive have been coupled with each other by a gear (diti'erential) drive. Under those circumstances the common drive of all the flyers on the onehand and all the bobbins on the other hand through a differential gear from a common motor was the given solution of the aroblem.

Owing to the incident great number of glfezzr wheels, worms and worm wheels suclra machine operates, however, with a considerable noise and the individual parts are subject to an excessive wear and tear. These intermediate mechanisms also liinit the speed (it the tlyer, so that the capacity of the frame cannot be raised beyond a certain naximum fixed by the maximum speed of the gear driven flyers. It a greater twist of the to reduce the output of the machine by reduring the speed ot' the delivery rollers.

in ordinary tlyer spinning frames for spinning yarns with full twist, success has already been attained by driving each flyer individually and in the simplest manner by an electric motor, thereby increasing the speed of the flyers and thus the production of the machine. A further increase in the output of the 'frame results from the fact that on rupture of the thread only the individual tlyer concerned need be stopped by switching oti' its motor, while the other flyers continue their work undisturbed. In this system self-braking bobbins are used, so that all driving parts for the bobbin are eliminated.

It has been tound that rove cannot be spun on such frames principally owing to the tollowing reasons. The angular deviof the twist up to the delivery rolls, owing to the tension to which the rove isnow sub- 1ected, and the untwisted roveis liable to break; moreover, even it the rove be twisted it is still not sutliciently strong to turn'an ordinary self-braking bobbin withcertainty and breakage of the rove would occur. Again when the flyers are driven individually it is essential to maintain, particularly d starting and stopping, a reasonable ratio between the speedot the delivery rollers and tlyers as otherwise the rove is liable to be broken or overtwis'ted.

According to my invention I provide a machine whereby the production of rove by means of fiyer frames, and more particularly by means of frames with two series of staggered bobbins, is rendered possible and with this object in view my invention consists in the provision ota machine characterized by theieature that the flyers are individually driven by e1ectrio-motors in knownmanner,that guide members are provided between the supply rollers and the hollow shaft otthe motor adapted to introduce the thread substantiallyvertically into the motor and that the bobbins are furnished with a known drag device the resistance against rotation of 'whichis reduced as fa as possible by special means.

By my invention 1 amable toproduce cone shaped-bobbins of rove, similar to the well known yarn cops.

An embodimentof my invention is illustrated in the drawing atfixedtothis specification and forming part thereof; These drawings represent in I Fig. 1 a sectional view of the improved form of rove guide.

Fig. 2 a similar View illustrating analter native form of guide and also means for taking up broken sliver.

Figs. 3, 4-, 5 and 6 detail views illustrating suitable sections of the guide shown in Fig. 1.

til

lue

Similar parts are indicated by similar reference numerals in the several figures of the drawings.

Referring to Figs. 1 and 2 the path of the -rove from the delivery roller to the bore of? the motor is diagrannnatically shown by way of example. In these figures, 1 is the roller. 2 a pressure roller, 8 and 4 the upper ends of two motor bores, one of the rear and one of the front series; and 6 are guides and 7 and 8 designates the rove. From this drawing it is obvious, that this manner of guidance attains a vertical or at least substantially vertical entrance of the rove 7 and 8 into the bores 3 and t of the motors whereby the twist is continued right up to the delivery rollers. The groove provided in the guides 5 and 6 for the rove may have any suitable cross-section. A number of constructive possibilities are illustrated in Figures 8 to 6.

lVhile in the construction according to Fig. 1 a continuous guidance of the rove along a curved line takes place, a polygon path is chosen instead in 2. The guidance is here effected by round rods 9. Here also the yarn enters the bore of the motor vertically or substantially vertically. As

' the rove makes contact at a few points only,

friction on the guiding elements is reduced to a minimum.

\Vhile in flyer frames with mechanically driven flyers and bobbins it is necessary to stop the entire frame when a single rove breaks, whereby a considerable reduction of the output of the machine is caused, tlyer frames having electrically individually driven flyers only require the stopping of the flyer belonging to the broken rove, by switching off its motor. As the operative is, however, not always able to rc-tie the broken rove at once the delivery rollers continue to pay out the rove and the latter is heaped up on the spinning rail and may reach adjacent slivers and cause rupture of further threads. In order to prevent this a roller is disposed in front of the delivery roller, and this additional roller is preferably driven in the opposite direction, but at substantially equal circumferential speed. If arove breaks the operative lays the rove which is still being delivered around this additional roller, while switching out the motor, which always can be'efl'ected without any con iderable loss of time. The roller then winds up the broken end and thus prevents its interfering with adjacent rove. This additional roller is in Fig. Qindicated by the reference number and the course of the rove towards the roller after the rupture is indicated in broken lines. hen tying up again for spinning, the rove is simply severed between the supplying roller 1 and the roller 10. lVhile this roller 10 is shown only in Fig. 2, it is implied also in the arrangement shown in Fig. 1.

If the available space renders it possible, this roller may also be disposed below the course of the thread so that after rupture of a thread the loose end drops upon this roller by gravity and is wrapped around it automatically. In order to increase the adhesion of the broken end upon this roller, the latter is preferably covered with a suitable friction material, such as plush or the like.

It will be readily understood that I do not limit myself to the details of construction illustrated by way of example and that these may be modified in many ways without departing from the spirit of my invention.

What I claim as my invention and desire to secure by Letters Patent is 1.. in a spinning frame having individually motor driven spindles, supply rollers, guide elements for the rove disposed between said supply rollers and the rove inlet into the spindles and adapted to introduce the rove into each spindle substantially in the direction of its rotation axis.

2. In a spinning frame having individually motor driven spindles, supply rollers, guide elements for the rove having substantially curved grooves and being disposed between said supply rollers and the rove inlet into the spindles and adapted to introduce the rove into each spindle substantially in the direction of its rotation axis.

3. In a spinning frame having individually motor driven spindles, supply rollers, gnideelements for the rove disposed between said supply rollers and the rove inlet into the spindles and adapted to introduce the rove into each spindle substantially in the direction of its rotation axis and revolving pick-up rollers disposed at the delivery side of said supply rollers and adapted to take up broken ends of rove.

I n testimony whereof I affix my signature.

HEINRICH SCHNEIDER. 

